Downloading files with these descriptions is :
: Many of these "410K" lists are recycled, fake, or filled with "junk" data to trick users into paying for "premium" access. Download 410K MAIL ACCESS VALID COMBOLIST rar
When advertised in underground communities, these files generally claim the following "features": Downloading files with these descriptions is : :
: The "valid" tag suggests the list has been run through an automated "checker" tool to verify that the passwords still work, supposedly saving the attacker time. Download 410K MAIL ACCESS VALID COMBOLIST rar
: Accessing or using stolen credentials is a violation of the Computer Fraud and Abuse Act (CFAA) and similar international laws.
The phrase you're asking about, is typically associated with cybercrime and credential stuffing.